In a group of 5 people, only 3 tickets were confirmed, how can the remaining two travel?

You are going somewhere by train. And booked tickets for 5 people together. So the system issues a PNR number. Information of all passengers is recorded in this PNR. But if the seats of only 3 out of 5 passengers have been confirmed then how will the remaining 2 travel?

Under earlier rules, some tickets were confirmed and some were in waiting. Even then all passengers could travel by train. Earlier, waiting list passengers were not deboarded from the train even if they did not get a seat. Seeing the situation, TTE used to give him permission to travel.